State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
State Key Laboratory of Luminescence Science and Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel). 2024 Sep 26;24(19):6222. doi: 10.3390/s24196222.
A fiber Bragg grating (FBG) pulse and systolic blood pressure (SBP) measurement system based on the edge-filtering method is proposed. The edge filter is the Mach-Zehnder interferometer (MZI) fabricated by two fiber couplers with a linear slope of 52.45 dBm/nm. The developed system consists of a broadband light source, an edge filter, fiber Bragg gratings (FBGs), a coarse wavelength-division multiplexer (CWDM), and signal-processing circuits based on a field-programmable gate array (FPGA). It can simultaneously measure pulse pulsations of the radial artery in the wrist at three positions: Cun, Guan and Chi. The SBP can be calculated based on the pulse transit time (PTT) principle. The measurement results compared to a standard blood pressure monitor showed the mean absolute error (MAE) and standard deviation (STD) of the SBP were 0.93 ± 3.13 mmHg. The system meets the requirements of the Association for the Advancement of Medical Instrumentation (AAMI) equipment standards. The proposed system can achieve continuous real-time measurement of pulse and SBP and has the advantages of fast detection speed, stable performance, and no compression sensation for subjects. The system has important application value in the fields of human health monitoring and medical device development.
基于边缘滤波法的光纤布拉格光栅（FBG）脉搏和收缩压（SBP）测量系统。边缘滤波器是由两个光纤耦合器构成的马赫-曾德尔干涉仪（MZI），其线性斜率为 52.45 dBm/nm。所开发的系统由宽带光源、边缘滤波器、光纤布拉格光栅（FBG）、粗波分复用器（CWDM）以及基于现场可编程门阵列（FPGA）的信号处理电路组成。它可以同时测量手腕桡动脉三个位置（寸、关、尺）的脉搏搏动。可以根据脉搏传输时间（PTT）原理计算 SBP。与标准血压监测仪的测量结果相比，SBP 的平均绝对误差（MAE）和标准偏差（STD）分别为 0.93 ± 3.13 mmHg。该系统符合医疗仪器促进协会（AAMI）设备标准的要求。所提出的系统可以实现脉搏和 SBP 的连续实时测量，具有检测速度快、性能稳定和对测试者无压迫感等优点。该系统在人体健康监测和医疗器械开发等领域具有重要的应用价值。
